For some reason my computer raps every 10 minutes or so. All I hear is a 1-2 second clip of some rap song and then it stops, I have NO idea what's going on. What the fuck is happening?
This happened to me and I searched FOREVER trying to figure out what it is. Whoever said "Custom AIM noises" is absolutely right.
Go into your AIM and change the settings to make sure all those notification sounds are off. Your problem will be fixed.
The thing that tricked me is a little status icon pops up in the status tray whenever it happens, it seemed to happen at random times, etc...
But yeah, Custom AIM noises.